West Canada- Climate and when to go to West Canada

Climate

Most of northern Canada has subarctic or arctic climates, with long cold winters lasting 8 to 11 months, short sunny summers, and little precipitation. In contrast, the populated south has a variety of climatological landscapes. The greatest temperature range is in the Northwest Territories, where the average temperature at Fort Good Hope ranges from-31°C in January to 16°C in July.
Cool summers and mild winters prevail only along the Pacific coast of British Columbia. There the temperatures range from about 4°C in January to 16°C in July, the least range in the country.

When to go
 
Across the Yukon, the Northwest Territories and Nunavut winters are bitterly cold, with temperatures rarely above freezing for months on end, though precipitation year-round is among the country's lowest. Summers, by contrast, are short but surprisingly warm, and spring - though late - can produce outstanding displays of wild flowers across the tundra.
 
The southwestern parts of British Columbia enjoy some of Canada's best weather: the extremes are less marked and the overall temperatures generally milder than elsewhere. Much of the province, though, bears the brunt of Pacific depressions, so this is one of the country's damper regions - visiting between late spring and early autumn offers the best chance of missing the rain.